Improvement in molding cast-iron wheels



' nrrn Srarns FATENT OFFICE.

GEORGE S. BOSVORTH, OF TROY, NEV YORK.

HWPROVEMENT lN MOLDING CAST-IRON WHEELS.

Speci lic-ation forming part oi' Letters Patent No. 30,5255, (l atedOctober 30, 1860.

To @ZE whom it may concern.-

Be it known that I, Gnonen S. BoswonTi-r, of the city of Troy,in thecounty of Rensselaer and State of New York, have invented a new anduseful Improvement in Molding Cast-Iron Car and other W'hcels withChilled Rims, whereby the requisite molds for casting such wheels can bemade by less skillful workmen and more expeditiously, and at lessexpense than previously; and I do hereby dec-lare that the following isa full and exact description thereof, reference being had to the annexeddrawings, making a part of this specification in which the same lettersof refence indicate like parts in all the figures.

Instead of employing` but one pattern of the same' form as the wholeexterior of the wheel A to be cast (shown in section by Fig. l) in themanner commonly practiced in making molds for casting in one piececar-wheels with chilled rims I use in making such molds twoface-patterns,B @,{shown in plan by Figs. 2 and 3,separately in sectionby Figs. 4; and 5, and together in section by Iig. 6,) one of whichface-patterns, B, is of the same form as one face, d, of the wheel, andthe other, (l, of the form of the other face, c, whatever form the facesof the wheel may have, both facepatterns having immediately around theouter edges of those parts which are in the form of the faces of thewheel, annular surfaces f g, of the same form as the correspondingparts, j" g', ofthe chill H, (shown in section by Fig. 7, and partiallyin plan by Fig. 8,) which chill I also employ,together with two llasks,I J,(shown in plan by Figs. Qand 10.) The facepatterns B O also havewhatever projections e y x are required to make the necessarycoreprints, if any cores are used in casting the wheel; also, the outerportion of one face-pattern,B,is formed to lit one of the ilasks,l, andof the other, G, to fit the other flask, J, substantially as shown inFigs. 11 and 12, the tlasks and face-patterns being held in place whenput respectively together by steady-pins 7s and corresponding holes, Z,or by other suitable or equivalent means. The flasks I and J also fitupon the corresponding sides, f g', of the chill, as shown in section byFig. 13, and the chill is held in place between the ilasks bysteady-pins k and holes m, or by equivalent devices.

In making molds for casting wheels with chilled rims by means of theface-patterns B C, flasks I J, and chill H in connection,

each flask is placed upon the face-pattern which belongs to it, and isthen rammed up full of sand, as represented by Figs. 11 and 12, and abottoni board, N, applied to the lower flask to hold the sand O therein.Next, each flask, clamped to its respective face-pattermis turned over.rlhen each pattern is lifted off from its ilask and the molds dusted Next, each face-pattern is pressed or printed back upon its mold and thenwithdrawn, in order to remedy any defects therein and to leave the moldswith the proper smooth surface for receiving the metal. The iii-gateswbeing previously formed in the upper mold, and the cores o w, if any areused, being set in the lower mold, the chill is then placed upon thelatter, and the upper mold placed upon the chill, so as to complete themold, as shown by Fig. 13.

It is plain that the two face-patterns can be used if they are bothformed upon the same side or upon opposite sides of a single block. Suchchanges are, however, mere modifications of my invention, and wouldreadily occur to any competent molder and pattern-maker, and I greatlyprefer to have the chill separate from each flask, and to have thefacepatterns each oh a separate block. It is also apparent thatdisk-wheels of different thicknesses maybe cast by the use ofthe verysame patterns and asks when the patterns are facepatterns B C by merelyusing chills of different depths; and this is a consideration of someimportance in manufacturing car-wheels for roads which require or usewheels of different thicknesses 5 butit cannot be done with the patternsin common use. Agaimthe facepatterns which I use can be made so as to beless liable to .become winding when made, as commonly, of wood, than thepatterns heretofore used, and if the face-patterns B C do get warped ordamaged on their faces they can be turned off or otherwise made truewithout altering the thickness of the wheel made from them; but thiscannot be donewith a single pattern of the form of the whole exterior ofthe wheel.

In using the two face-patterns the steadypins serve as guides, so thatthere is no difficulty in printing the patterns back upon the molds toremedy defects therein. Consequently the molds do not require to beslieked off by hand, and, therefore, workmen can readily make the moldsby my improved Inode who are not qualified to make them by the methodcommonly practioechwherein thepattern cannot be printed back upon themold with proit.

I am aware that itis not new to employ facepatterns in connection withflasks merely in making molds for casting stove-plates and likearticles, and that it is not new to merely use a frame between two sandmolds to separate them so that a casting can be made in the molds andwithin and of the same depth as the said frame, and that the mereemployment of two flasks in connection with a chill is not new in makingmolds for casting car-wheels; but l do believe that it is new to employthe two faee-patterns B C, two flasks, I J, and chill H, all three incombination or connection as above specified, and illustrated by theannexed drawingsnd by thus using them all iu connection in making moldsfor casting earwheels with chilled rims in I am enabled to make suchmolds much faster, generally better, and with far less labor and expensethan by the method in Common use, and can, therefore, manufacture suoliwheels at a cheaper rate than they have been heretofore made.

Having thus shown the manner of practicing my invention, what I cla-imis- Forming a mold by means of a flask, consisting` of three part-s, towit: a cope, a nowel or drag, and cheeks or chill, the two former beingopen to rain up the sand to form the mold on facepatterns which canbeprinted back, the mold being formed in the manner and by the means setforth, and the thickness and weight of the wheel being determined by thedepth of the cheeks, which can be varied in the same sized wheel andwith the same pattern andsame cope and nowel.

GEO. S. lEOSVORTH. RVi t n esses l. S. BARNBY, A. F. Panic.

